Physics design requirements for the National Spherical Torus Experiment liquid lithium divertor

被引：32

作者：

Kugel, H. W. ^{[1
]}

Bell, M. ^{[1
]}

Berzak, L. ^{[1
]}

Brooks, A. ^{[1
]}

Ellis, R. ^{[1
]}

Gerhardt, S. ^{[1
]}

Harjes, H. ^{[2
]}

Kaita, R. ^{[1
]}

Kallman, J. ^{[1
]}

Maingi, R. ^{[2
]}

Majeski, R. ^{[1
]}

Mansfield, D. ^{[1
]}

Menard, J. ^{[1
]}

Nygren, R. E. ^{[3
]}

Soukhanovskii, V. ^{[4
]}

Stotler, D. ^{[1
]}

Wakeland, P. ^{[5
]}

Zakharov, L. E. ^{[1
]}

机构：

[1] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[2] Oak Ridge Natl Lab, Oak Ridge, TN USA

[3] Sandia Natl Labs, Albuquerque, NM 87185 USA

[4] Lawrence Livermore Natl Lab, Livermore, CA USA

[5] K Tech Corp, Albuquerque, NM USA

来源：

FUSION ENGINEERING AND DESIGN | 2009年 / 84卷 / 7-11期

关键词：

Lithium; Divertors; Lithium wall fusion regime;

D O I：

10.1016/j.fusengdes.2008.11.102

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Recent National Spherical Tokamak Experiment (NSTX) high-power divertor experiments have shown significant and recurring benefits of solid lithium coatings on plasma facing components (PFCs) to the performance of divertor plasmas in both L- and H-mode confinement regimes heated by high-power neutral beams. The next step in this work is installation of a liquid lithium divertor (LLD) to achieve density control for inductionless current drive capability (e.g., about a 15-25% n(e) decrease from present highest non-induction less fraction discharges which often evolve toward the density limit, n(e)/n(GW) similar to 1), to enable n(e) scan capability (x2) in the H-mode, to test the ability to operate at significantly lower density (e.g., n(e)/n(GW)=0.25), for future reactor designs based on the Spherical Tokamak, and eventually to investigate high heat-flux power handling (10 MW/m(2)) with long pulse discharges (>1.5 s). The first step (LLD-1) physics design encompasses the desired plasma requirements. the experimental capabilities and conditions, power handling, radial location, pumping capability, operating temperature, lithium filling, MHD forces, and diagnostics for control and characterization. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1125 / 1129

页数：5

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